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Parasite Image Database: Ticks

The following images are provided as teaching aids to train and educate veterinarians. There are about 400 images on this site. Liberties were taken with parasite grouping to provide a veterinary medical emphasis.

Hard

   
   
   

Amblyomma americanum

Amblyomma americanum is known as the lone star tick.  It is arguably the most prevalent tick in the south-central and southeastern United States. This tick is considered a generalist and will feed on a wide variety of avian and mammalian hosts.

 

Amblyomma americanum

Larva, nymph, male and female of A. americanum.

 

Amblyomma maculatum

Amblyomma maculatum is known as the Gulf coast tick.  Adults of A. maculatum are some of the largest ticks in the United States.  Originally restricted to lands along the Gulf of Mexico, this tick can now be found as far north as Kansas and Oklahoma.

 

Amblyomma; Darcy; Integumentary;

Amblyomma maculatum 

Adult female Amblyomma maculatum seen attached to the scalp of a human host. This species has been shown to be a competent experimental vector of Ehrlichia ruminantium and has been reported as vectoring Rickettsia parkeri to humans.

 

Amblyomma tuberculatum; reptiles; haemolymphatic; integumentary

Amblyomma tuberculatum 

Amblyomma tuberculatum attached and feeding on a gopher tortoise (Gopherus polyphemus). The Gopher tortoise is the primary host for adult A. tuberculatum, but nymphs of the species have been reported on various reptilian hosts.

 

Dermacentor andersoni; integumentary

Dermacentor andersoni

Dermacentor andersoni is known as the Rocky Mountain wood tick. As the common name of this tick suggests, it is found throughout the Rocky Mountain states.

D. variabilis male and female

Dermacentor variabilis

Dermacentor variabilis is known as the American dog tick. Even through this tick is found on dogs, the common name of D. variabilis is misleading as it is also routinely found on a wide variety of other domestic and wild animals.

 

I. scapularis male and female

Ixodes scapularis

Ixodes scapularis is known as the black-legged tick or deer ticks. This tick is found in the northeastern, upper mid-west, and throughout the southern and south-central United States. Differences in host preferences for immature stages in northern and southern ranges of this tick influence the occurrence in epidemiology of anaplasmosis and Lyme disease throughout the United States.

 

R. sanguineus male and female

Rhipicephalus sanguineus

Rhipicephalus sanguineus is known as the brown dog tick. Dogs are the preferred hosts for R. sanguineus but they can occasionally infest other animals including humans.  Brown dog ticks are found all across the United States and throughout the world.

Rhipicephalus sanguineus

Larva, nymph, male and female of R. sanguineus.

Rhiphicephalus; tick; canine; integumentary; haemolymphatic;

Rhipicephalus sanguineus

Rhipicephalus sanguineus feeding in a dogs inguinal area and ventral abdomen. Two large adults are indicated by the arrows. Adults, nymphs, and larvae may all be found on the same dog at one time.

Rhiphicephalus; bovine; haemolymphatic; integumentary

Rhipicephalus annulatus  

Cow infested with Rhipicephalus annulatus, the one-host 'cattle fever tick.' An important vector of Babesia bovis, Babesia bigeminaand Anaplasma marginalean eradication effort against this tick began in 1906 and by 1943, it was eliminated from the United States, outside of a small quarantined area on the USA-Mexico border.


 

 

Soft

Argas spp.

Argas species  (commonly called Fowl ticks) are soft ticks that live in the environment that feed on poultry and wild birds. The mouthparts are not visible from the dorsal surface, which is characteristic of soft ticks. Note the granulated surface and flattened body margin of this tick.

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Otobius megnini

Nymph of Otobius megnini. This tick is known as the Spinose ear tick. Larvae and nymphs feed in the external ear canal of ruminants and horses, but sometimes camelids and small animals. The adults are free-living and do not feed. Like other soft tick species, the mouthparts are not visible from the dorsal aspect. Note the short spines covering the surface of the tick.

Ornithodoros spp.

A gathering of Ornithodoros species. When not feeding, these free living ticks may be found near the resting places of animals.

vector; tick; Ornithodoros; haemolymphatic

Ornithodoros turicata


Ventral aspect of Ornithodoros turicata. A soft tick of the southwestern United States, O. turicata is a vector for Borrellia turicata a cause of relapsing fever in humans and thus is known as the relapsing fever tick.